package com.ysd.resourceusestatistics.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.ysd.resourceusestatistics.model.Member;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

public class LoginInterceptor implements HandlerInterceptor{


	@Override
	public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object o, Exception e)
			throws Exception {

	}

	@Override
	public void postHandle(HttpServletRequest request, HttpServletResponse response, Object o, ModelAndView m)
			throws Exception {
	

	}

	@Override
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object o) throws Exception {
		
		// 获取请求的RUi:去除http:localhost:8080这部分剩下的
		String uri = request.getRequestURI();
		// UTL:除了login.jsp是可以公开访问的，其他的URL都进行拦截控制
		if (uri.indexOf("login") >= 0) {
			return true;
		}
		// 获取session
		HttpSession session = request.getSession();
		Member m = (Member) session.getAttribute("login");
		// 判断session中是否有用户数据，如果有，则返回true，继续向下执行
		if (m != null) {
			// return true代表放行
			return true;
		}
		// 不符合条件的给出提示信息，并转发到登录页面
		request.setAttribute("msg", "您还没有登录，请先登录！");
		request.getRequestDispatcher("/login").forward(request, response);

		// return false代表拦截
		return true;
	}

}